Fuel Cost Calculator
Estimate how much fuel a trip will cost from distance, vehicle efficiency, and gas price.
How it works
Cost = (distance / mpg) · price per gallon. Metric: (distance/100) · L/100km · price/L.
300 mi at 25 mpg with $3.75/gal → 12 gal × $3.75 = $45.
Frequently asked questions
- MPG vs L/100km?
- Both measure efficiency inversely — higher mpg = lower L/100km.
- Real-world MPG?
- Usually 10–20% below EPA-rated depending on driving.
- Does hilly terrain matter?
- Yes — more elevation gain lowers effective mpg.
- EVs?
- Use kWh/mile × electricity price.
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